Effect ofPseudomonas putidaon Growth and Anthocyanin Pigment in Two Poinsettia(Euphorbia pulcherrima)Cultivars

Abstract

Pseudomonas putida is plant growth promoting rhizobacteria (PGPR) that have the capacity to improve growth in plants. The purpose of this study was to determine growth and anthocyanin pigmentation of the bracts in two poinsettia Euphorbia pulcherrima cultivars (Prestige and Sonora Marble) using three strains of P. putida, as well as a mixture of the three (MIX). Comparison with the control group indicated for the most part that Prestige grew better than the Sonora Marble cultivars with the PGPR strains. Prestige with the MIX strain grew better compared to control for the number of cyathia (83 versus 70.4), volume of roots (45 versus 35 cm3), number of leaves (78 versus 58), and area of leaf (1,788 versus 1,331 cm2), except for the number of flowers (8.8 versus 11.6). To the naked eye, coloration of plants appeared identical in color compared to the control group. For all plants with P. putida strains, there was less anthocyanin pigment, but biomass was always greater with PGPR strains. Nevertheless, to the naked eye, the coloration of the plants appeared identical in color compared to the control group. This is the first study reporting the positive effects of P. putida rhizobacteria treatments on growth of poinsettia cultivars.

Assessment of Different PGPR Formulations as a Biological Fertilizer in Cultivation of Poinsettia (<i>Euphorbia pulcherrima</i>)

“…The inoculated PGPRs on Cistus ladanifer flower seedlings increased in the number of leaves, in the study conducted by Solano et al [33]. Pseudomonas putida rhizobacteria was effective in increasing the number of leaves of poinsettia [19]. It is thought that the reasons for differences determined in terms of the total number of leaves between applications, in previous studies [34][35][36] and this study may be related to the species and quantity of microorganisms located in the growing medium and that are transformed into the form that the plant can take of the nutrients.…”

“…There are few studies on the use of PGPRs in ornamental plant cultivation [16][17][18]. The number of researches about the use of PGPR [19] in poinsettia production is also very limited in the world.…”

Effects of Different PGPR Formulations, Chemical Fertilizers and Their Combinations on Some Plant Growth Characteristics of Poinsettia

“…Poinsettia (Euphorbia pulcherrima Willd. ex Klotzsch) is one of the most important indoor plants grown for showy flowers and a member of the Euphorbiaceae family (Steinmann and Porter, 2002;Zulueta-Rodriguez et al, 2014). It is known that poinsettia is highly sensitive to day length and temperature (Larson et al, 1978).…”

“…There are few studies on the use of plant growth promoting rhizobacteria in cultivation of ornamental plants (van Peer et al, 1991;Padmadevi et al, 2004;Selvaraj et al, 2008;Karishma et al, 2013;Parlakova, 2014;Arab et al, 2015;Parlakova Karagöz and Dursun, 2019). In this context, the number of researches on the use of PGPR (Zulueta-Rodriguez et al, 2014) in poinsettia is very limited in worldwide.…”

Pseudomonas fluorescens R68 assisted enhancement in growth and fertilizer utilization of Amaranthus tricolor (L.)

“…PGPR like Pseudomonas fluorescens and Pseudomonas putida have also been reported to improve wheat yield to 96% with reduced dependence on inorganic nitrogen (Selvakumar et al 2012). Inoculation of Pelargonium graveolens with P. fluorescens have also been shown to have enhancing effect on growth and biomass (Zulueta-Rodriguez et al 2014). However, identification of microorganisms with potential agricultural applications is highly challenging.…”